<template>
  <a-layout>
    <a-layout-content :style="{
      background: '#fff',
      padding: '24px',
      margin: 0,
      minHeight: '280px',
    }">
      <p>
        <a-form layout="inline" :model="param">
          <a-form-item>
            <a-input v-model:value="param.name" placeholder="名称"> </a-input>
          </a-form-item>
          <a-form-item>
            <a-button type="primary" @click="handleQuery({ page: 1, pageSize: pagination.pageSize })">
              查询
            </a-button>
          </a-form-item>

          <a-form-item>
            <a-button type="primary" @click="reset()"> 重置 </a-button>
          </a-form-item>
          <a-form-item>
            <a-button type="primary" @click="add()"> 新增 </a-button>
          </a-form-item>
        </a-form>
      </p>
      <a-table :columns="columns" :row-key="(record) => record.id" :data-source="ebooks" :pagination="pagination"
        :loading="loading" @change="handleTableChange">
        <template #cover="{ text: cover }">
          <img v-if="cover" :src="cover" alt="avatar" />
        </template>
        <!-- 分类名称渲染 -->
        <template v-slot:category="{ text, record }">

          <span>{{ getCategoryName(record.category1Id) }} / {{ getCategoryName(record.category2Id) }}</span>
        </template>
        <template v-slot:action="{ text, record }">
          <a-space size="small">
            <router-link :to="'/admin/doc?ebookId=' + record.id">
              <a-button type="primary">文档管理</a-button>

            </router-link>
            <a-button type="primary" @click="edit(record)"> 编辑 </a-button>
            <a-popconfirm title="删除后不可恢复,确认删除?" ok-text="确认" cancel-text="取消" @confirm="handeleDelete(record.id)">
              <a-button type="primary" danger> 删除 </a-button>
            </a-popconfirm>
          </a-space>
        </template>
      </a-table>
    </a-layout-content>
  </a-layout>



  <!-- 模态框组件 -->
  <a-modal title="电子书表单" v-model:visible="modalVisible" :confirm-loading="modalLoading" @ok="handleModalOk">
    <!-- 表单组件 -->
    <a-form :model="ebook" :label-col="{ span: 6 }" :wrapper-col="{ span: 18 }">
      <a-form-item label="封面">
        <a-input v-model:value="ebook.cover" />
      </a-form-item>
      <a-form-item label="名称">
        <a-input v-model:value="ebook.name" />
      </a-form-item>
      <!-- 级联组件 -->
      <a-form-item label="分类">
        <a-cascader v-model:value="categoryIds" :field-names="{ label: 'name', value: 'id', children: 'children' }"
          :options="level1" />
      </a-form-item>
      <a-form-item label="描述">
        <a-input v-model:value="ebook.description" type="textarea" />
      </a-form-item>
    </a-form>
  </a-modal>
</template>

<script lang="ts">
import { defineComponent, onMounted, ref } from "vue";
import { message } from 'ant-design-vue';
import axios from "axios";
import { Tool } from "@/utils/tool";

export default defineComponent({
  name: "AdminEbook",
  setup() {
    const ebooks = ref();
    const pagination = ref({
      current: 1,
      pageSize: 3,
      total: 0,
    });
    const loading = ref(false);


    // 查询参数
    const param = ref();
    param.value = {};

    // 级联选择
    /**
   * 数组，[100, 101]对应：前端开发 / Vue
   */
    const categoryIds = ref();// 级联选择组件的初始化


    // 模态框组件
    const ebook = ref(); //表单组件
    const modalVisible = ref<boolean>(false);
    const modalLoading = ref<boolean>(false);
    const handleModalOk = () => {
      modalLoading.value = true;

      // 级联选择
      //categoryIdS : array
      //二级分类 0 1
      ebook.value.category1Id = categoryIds.value[0];
      ebook.value.category2Id = categoryIds.value[1];


      axios.post("/ebook", ebook.value).then(res => {

        const data = res.data;
        console.log(res.data)
        modalLoading.value = false;
        if (data.code === '200') {
          message.success('操作成功!');
          modalVisible.value = false;


          //重新加载列表
          handleQuery({
            page: pagination.value.current,
            pageSize: pagination.value.pageSize,
          });
        } else {
          message.error(data.msg);
        }
      })
    };

    /*
     * 编辑
     */
    const edit = (record: any) => {

      modalVisible.value = true;
      // ebook.value = record;
      // 进行对象拷贝（深拷贝）从而不影响record本身
      ebook.value = Tool.copy(record);
      categoryIds.value = [ebook.value.category1Id, ebook.value.category2Id];
    };

    /* 新增 */
    const add = () => {
      modalVisible.value = true;
      ebook.value = {};
    };

    /* 重置按钮 */
    const reset = () => {
      param.value = {}
      handleQuery({
        page: 1,
        pageSize: pagination.value.pageSize,
      })
    };

    /* 删除电子书 */
    const handeleDelete = (id: number) => {
      axios.delete(`/ebook/${id}`).then(res => {
        const data = res.data;
        if (data.code === '200') {
          message.success('删除成功!');
          //重新加载列表
          handleQuery({
            page: pagination.value.current,
            pageSize: pagination.value.pageSize,
          });
        }
      })
    };



    // 级联选择逻辑
    const level1 = ref();
    let categorys: any;

    /**
     * 查询所有分类
     **/
    const handleQueryCategory = () => {
      loading.value = true;
      axios.get("/category/list").then((response) => {
        loading.value = false;
        const data = response.data;
        if (data.code === '200') {
          categorys = data.data;
          console.log("原始数组：", categorys);

          level1.value = [];
          level1.value = Tool.array2Tree(categorys, 0);
          console.log("树形结构：", level1.value);

          // 加载完分类后，再加载电子书，否则如果分类树加载很慢，则电子书渲染会报错
          handleQuery({
            page: 1,
            pageSize: pagination.value.pageSize,
          });
        } else {
          message.error(data.msg);
        }
      });
    };


    const getCategoryName = (cid: number) => {

      let result = "";
      categorys.forEach((item: any) => {
        if (item.id === cid) {
          // return item.name; // 注意，这里直接return不起作用
          result = item.name;
        }
      });
      return result;
    };



    const columns = [
      {
        title: "封面",
        dataIndex: "cover",
        slots: { customRender: "cover" },
      },
      {
        title: "名称",
        dataIndex: "name",
      },
      {
        title: "分类",
        slots: { customRender: "category" },
      },
      {
        title: "文档数",
        dataIndex: "docCount",
      },
      {
        title: "阅读数",
        dataIndex: "viewCount",
      },
      {
        title: "点赞数",
        dataIndex: "voteCount",
      },
      {
        title: "Action",
        key: "action",
        slots: { customRender: "action" },
      },
    ];

    /**
     * 数据查询
     **/
    const handleQuery = async (params: any) => {
      loading.value = true;
      // 如果不清空现有数据，则编辑保存重新加载数据后，再点编辑，则列表显示的还是编辑前的数据
      ebooks.value = [];
      try {
        const response = await axios.get("/ebook/list", {
          params: {
            page: params.page,
            pageSize: params.pageSize,
            name: param.value.name,
          },
        });

        loading.value = false;
        const data = response.data;
        if (data.code === '200') {
          ebooks.value = data.data.rows;
          pagination.value.current = params.page;
          pagination.value.total = data.data.total;
        } else {
          message.error(data.msg);
        }
      } catch (error) {
        loading.value = false;
        // 处理错误情况，比如显示一个错误消息
        message.error("An error occurred while fetching data.");
        console.error(error);
      }
    };

    /**
     * 表格点击页码时触发
     */
    const handleTableChange = (newPagination: any) => {
      console.log("看看自带的分页参数都有啥：" + JSON.stringify(newPagination));
      handleQuery({
        page: newPagination.current,
        pageSize: newPagination.pageSize,
      });
    };

    // -------- 表单 ---------

    onMounted(() => {
      handleQueryCategory();//初始查询全部分类

    });

    return {
      ebooks,
      pagination,
      columns,
      loading,
      handleTableChange,

      // 级联选择
      handleQueryCategory,
      getCategoryName,

      categoryIds,
      level1,


      // 模态框
      edit,
      add,
      reset,


      ebook,
      modalVisible,
      modalLoading,
      handleModalOk,
      handeleDelete,
      handleQuery,
      param,

    };
  },
});
</script>

<style scoped>
img {
  width: 50px;
  height: 50px;
}
</style>
